The Light Switch

Write a function toggleSwitch(isOn) that takes a single boolean value (true or false) representing the state of a light switch. Your function should return the new state of the switch.

Test Cases:

• toggleSwitch(true) should return false

• toggleSwitch(false) should return true

💡 The 'Syntax Nudge'

This one is a direct application of the operator. How can you use ! on the isOn argument to return the opposite value?

The Logical NOT ! is a unary operator because it only works on one operand (the value right after it).

Its job is simple:

1. It takes any value.

2. It coerces (converts) that value into its "truthy" or "falsy" boolean equivalent.

3. It flips that boolean.

• !true becomes false

• !false becomes true

• !"hello" (a "truthy" string) becomes false

• !0 (a "falsy" number) becomes true